E.g. a timer-only connection

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Increase heap size to 44K (13K free after init)
Add File.list() support
Fix a bunch of bugs in file support
Disable sys_init.js, there just isn't enough RAM...

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Contributed by @f4bsch in https://github.com/cesanta/mongoose/pull/626
Submitting here with a minor change: MSDN says that ws2ipdef.h should
not be included directly and users should include ws2tcpip.h

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Identifiers starting with _ are reserved, fix those.
Wrote a tool to do it and applied it globally, why not.

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Remove Krypton TODO: SSL{,_CTX}_set_cipher_list have been added
(but these ciphers are not supported).

Fixes cesanta/dev#2975

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This should cover 2^64-2^64/2^64

H/T @julee

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